Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Lerwick to Belfast Intl Airport as you normally would.
Located just 0.2 mi from the city center, Lerwick All Airports is the airport most travelers will use when flying to Belfast Intl from Lerwick. Booking flights from All Airports (SDZ) to Belfast Intl should be relatively easy as there are 0 daily outbound flights to Belfast Intl from 0 different airlines.